Ok guys I've got a bit of an issue. I've got the fswerks kit and replaced the stock Bosch dv with the turbosmart kompack plumb back dv. Exact same setup, same hoses, vacuum line etc. For some reason I just can't get rid of that fluttering sound like its not getting vacuum. Had no problems with the old Bosch one. Anything im missing here?

The tension is only for if you having idle issues with the valve. Like PSUrivie I would see what it does under full boost. If it still flutters double check all connections including charge pipes. I know my factory and even the turbosmart dual port I was running fluttered a bit under low boost. Full boost discharged properly.

I had a Turbosmart dual port on my car that I could never get set up right. I kept getting flutter and all kind of weird issues. I HIGHLY recommend getting the FSW DV, which is a DV20. Or if you want more woosh get a Bailey Motorsport DV30. I have ran each one and the FSW kit loves them both.

Common conditions that result in compressor surge on turbocharger gasoline engines are:

-A compressor bypass valve is not integrated into the intake plumbing between the compressor outlet and throttle body
-The outlet plumbing for the bypass valve is too small or restrictive
-The turbo is too big for the application

No its not doing it at full boost just low around the 4-5 psi range. So the fluttering is normal at low boost with these? Sometimes its so bad I get below 1000 rpms when I let off the throttle like it wants to stall, never does though. Very annoying.

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